A detailed comparison of two novel approaches to developing web apps : Node.js and Opa. Both technologies are open source, allow writing "Hello world" web app in just a few lines and both focus on the Web rather than on generic programming. However, Opa seems to be much more concise, is strongly typed and by design makes most popular security threats void.

I will say basically what I replied to you in the comment below the article. I never tried to hide that I work for MLstate (it's in my bio!) and I tried to write an unbiased article. If I failed -- be sure people will point that out in the comments. Whether you want to trust the article or not, that's of course up to you, but why don't you just test it for yourself? Finally: the code of the running example in Node.js and Opa is easily available and linked to in the article so you don't have to trust me, you easily verify most of the claims I made in the article on your own.